International Journal of Knowledge Based Computer Systems 7 (1), June 2019, 01-09 http://www.publishingindia.com/ijkbcs/ Context Based Cricket Player Evaluation Using Statistical Analysis Vaibhav Khatavkar1* and Parag Kulkarni2 1Research Scholar and Assistant Professor, Department of Computer Engineering and Information Technology, College of Engineering, Pune, Maharashtra, India. Email: [email protected] 2Adjunct Professor, Department of Computer Engineering and Information Technology, College of Engineering, Pune, Maharashtra, India. Email: [email protected] *Corresponding Author Abstract: In business, making decisions on the spot is a is fired for a term the systems computes context vectors and critical task since data is available online. Same applies for gives terms related to the query fired. Deepali extracted named sports. For managers and coaches selection of best fit player entities from a document in order to find theme of a document in the team has to be made. Many times, team managers which is context of a document [13]. have to bid for the players. Many statistical methods are applied in order to evaluate a player for sports, specially, Statistical analysis is instrumental in determining the trends baseball, and football. This paper focuses on Cricket since it and predicting the future results. The sports sector is ultra- has been deprived of good statistical methods. Typically, for dynamic and hence the statistical analysis of sports data is a cricket, Deep Performance Index (DPI) method is used to challenging task at the same time this analysis is a necessity evaluate a player. But it has some limitations. This work aims because creating a strategy against a team or for a tournament to assimilate the best features of the previous approaches demands an in-depth study of opponent team(s) as well as of the and losing the drawbacks. An algorithm is devised for team players on both sides. Baseball has adapted to this need statistical analysis of cricket data and particularly Indian the earliest and hence is ahead of the curve. There are many Premier League (IPL) data which can be later extended approaches available for statistical analysis of baseball data and to other sports with minor customizations. The algorithm there a dearth of options for other sports. considers context of the player in terms of indices like most Football (one of the most popular sports across the globe) has valuable player index for batsman and for bowler. The always resisted the use of technology but now with the advent important context introduced is winning contribution ratio of goal line technology and the investment in the development of the player. The algorithm is tested on IPL and proves to of statistical analysis methods it’s catching up. Some attempts be comparable with DPI. Hypothesis testing is performed to have been made to develop and implement an approach for validate the results. statistical analysis of cricket data, but much work is needed. Keywords: Context, Cricket data mining, Hypothesis Indian Premier League (IPL), which started in 2008 has gained testing, Indian Premier League (IPL), Statistical analysis. immense popularity and is a commercial hit. IPL structure involves an auction where team owners and executives bid on a player with certain base price. The auction in itself is a complex I. INTRODUCTION game which demands readily available statistics with in depth analysis. The player ratings, the player’s current form and the In today’s era data analysis plays an important role in the highest bid the player is worthy of are to be determined, this field of Information Retrieval (IR). IR is widely used in motivated us to develop an approach for determining the value business applications where in data can be collected and of a player by statistically analyzing the data available and predicting his performance in near future. decisions can be made in real time. Khatavkar and Kulkarni identified context of a document with the help of Latent The current methods available heavily depend on the individual Semantic Analysis [11]. In their work they used Singular Value contribution of the player and the parameters considered are Decomposition of Semantic Analysis. The idea of representing found lacking while determining the players contribution to the documents in term of forest of graphs is proposed [12]. The result. Currently the parameters considered are average, runs researchers [15] focused on the current trends in document and strike rate for a batsman and average, wickets and economy analysis. They concluded that context of a document plays a for a bowler. We aim to devise an approach for evaluating a crucial role in data analysis. In their work [14] presented the player based on the venue of match, overall average, current use of context vectors in document analysis. When a query season average and additional parameters. The results of this 2 International Journal of Knowledge Based Computer Systems Volume 7, Issue 1, June 2019 approach will vary, because every sport has a complex time-line Another tool used in Baseball statistical analysis is Value which changes the result, pertaining to every minute change in Over Replacement Player (VORP). VORP is a relative value the event time-line. For example, in cricket every ball has more statistics used to present the offensive contribution of a hitter than seven possible outcomes. Thus, this work aim to devise or the contribution of a pitcher to his team in comparison to a an approach with defined constraints and highest possible theoretical “replacement player”, considered to be an average accuracy to evaluate a player and his contribution to the team. fielder at his position and also a below average hitter. We intend to develop an approach for statistical analysis of IPL data based on the earlier approaches in various sports, which VORP is not a projected statistic, but a form of cumulative can be worked upon to be applied to the overall sports scenario. statistics (counting statistics). Take for an example, a player having a VORP of +30 runs after 90 matches, has contributed 30 This motivates us to derive context of the player in sports more runs of offense to his team compared to what the fictitious specifically in cricket. The context will be defined with various replacement player would have, over 90 games. The players indices like the most valuable batsman, bowler etc. VORP will either increase or decrease based his performance The paper is arranged as follows: Section II gives the work throughout the rest of the season and will then attain a final done in the area of context and sports. Section III explains the figure, for example +40. proposed system followed by experimentation and results in A non standardized tool named WARP is also used in Baseball. Section IV. Section V concludes the paper with future scope. To ascertain a player’s total contributions to his team, a non- standardized statistical tool has been developed, known as II. LITERATURE SURVEY WAR (Wins above Replacement) or Wins Above Replacement Player (WARP). This value is determined by determining the A lot of statistical analysis has been done on two games namely number of additional wins achieved by the player’s team above baseball and cricket. The empirical analysis of baseball is the expected number of team wins if a replacement-level player known as Sabermetrics. It is baseball statistics that is used to substituted the player in question. (A replacement player may measure in-game activity. This data obtained from in-game be known as a player who costs minimal cost and effort when activity is collected by Sabermetricians. Player Empirical added to the team). The number and success rate of the on- Comparison and Optimization Test Algorithm, also known as field performance by a player determines the WAR value of the PECOTA is a sabermetric system for predicting the performance player. Larger contributions of the player to the team’s success, of major league baseball. PECOTA also became the inspiration which can be either in terms of playing time or in terms of for some similarly functioning projection systems for other successful matches, are indicated by higher WAR values. The professional sports [1]. KUBIAK for the national football WAR value is determined on the basis of the appraised number league, SCHOENE and CARMELO for the National Basketball of runs won by a player in batting and base running and runs Association and VUKOTA for the National Hockey League are saved by the player in fielding and pitching. Ultimate Zone some examples. The four major categories of attributes used for Rating (UZR), Ultimate Base Running (UBR) and Fielding- determining a player’s comparability, according to this tool are Independent Pitching (FIP) are some more statistics used to Production metrics, Usage metrics, phenotypic attributes and get an approximate of the runs made and runs defended by the fielding position. Usually, the database is very large, enough player. This can be estimated by multiplying these statistics and to provide a meaningfully huge set of suitable comparables. In the players playing time. But, this WAR method is prejudiced to case of absence of an appropriate comparable, the designers favor past players because of the higher variance in skill levels design program to ‘cheat’ by extending its tolerance [4] i.e., by at the time. including dissimilar players for comparison to reach a reasonable sample size [1]. Primarily, a three-year window of a pitchers Sometimes Averaging is also used in baseball analysis. Clay performance is used to predict the similarity scores in PECOTA Davenport invented this method. This method was developed [1]. Hence, it enables us to look at a pitchers performance in to determine the production of hitters exclusive of league and age 35 to 37, and compare the same with the most similar park factors.